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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 85MA 8-QFN
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：24V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1V @ 85mA
- Current - Output：85mA
- Current - Quiescent (Iq)：7 µA
- Current - Supply (Max)：8.5 µA
- PSRR：57dB ~ 38dB (100kHz ~ 1kHz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-VDFN Exposed Pad
- Supplier Device Package：8-QFN (3x3)
- Grade：-
- Qualification：-
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Overview
The LDK715PU33R is a fixed-output linear voltage regulator from STMicroelectronics, providing a stable 3.3 V output with a maximum current of 85 mA. It operates within an input voltage range of 4.3 V to 24 V and features a typical dropout voltage of 500 mV at full load. The device exhibits ultra-low quiescent current of 5 µA at full load and includes internal short-circuit current limitation for fault protection. It is housed in an 8-QFN (3x3 mm) package and supports ceramic output capacitors ranging from 0.47 µF to 10 µF.
Feature Summary
- Ultra-low quiescent current consumption suitable for battery-powered systems
- High input voltage tolerance up to 24 V
- Internal short-circuit current limitation for fault protection
Applications
- Low power industrial applications
- Battery-powered systems
- Portable electronic devices requiring high input voltage tolerance
Procurement Notes
Verify the specific package variant and output voltage accuracy against the official datasheet before integration. Confirm that the application circuit utilizes compatible ceramic output capacitors within the specified range to ensure stability. Check for any recent product change notifications regarding manufacturing sites or material composition updates.
Selection Notes
Select this component when a wide input voltage range up to 24 V is required alongside low static current consumption. It is appropriate for designs prioritizing energy efficiency in battery-operated environments. Ensure the thermal management strategy accounts for the power dissipation at the expected load current and input voltage differential.
Part Context
This part belongs to the LDK715 series of high-voltage, low-dropout linear regulators. The series offers various output voltages and packages, including SOT23-5 and DFN8. The PU33R suffix specifically denotes the 3.3 V fixed output version in the 8-lead QFN package, distinguishing it from adjustable or other fixed voltage variants within the same family.
Replacement Considerations
Direct substitutes include other LDK715 variants with different output voltages if system requirements change, such as LDK715PU50R for 5.0 V. For pin-compatible alternatives with different electrical characteristics, consult the manufacturer's portfolio for similar LDO regulators with comparable input voltage ranges and output currents.
